The Sun Baby, or Baby Sun, is a supporting character in the famous British children's television series, Teletubbies. As her name implies, she is the sun of Teletubbyland that has the face of a baby. She shines in the sky and makes baby noises, in which she usually giggles and laughs almost all the time, being excited during any Magical Event or when watching the Teletubbies do funny and silly things.
The Sun Baby appears as an Assist Trophy in All Star Smashers. When summoned, she covers the screen, which blinds CPU's, similar to Captain Underpants' Neutral B.
In various episodes of Teletubbies, the Sun Baby will appear on-screen for 5 seconds after a scene has ended, in which she mostly just laughs at what had just happened. She is also seen in the Intro and Outro to every episode.